Effect of Ecological Conditions on Flower Bud Differentiation of Blueberries

Flower bud differentiation and number of blueberry were studied in different ecological conditions.The result showed that annual average temperature,cumulative temperature and frost-free period were the main factors,and the progress tendency of flower bud differentiation of four blueberry cultivars in the three ecosystem were the same in different regions.The expression is that the flower bud differentiation of Shandong was the earliest,then Liaoning,and Jilin was the latest. Moreover,highbush blueberry flower bud differentiation needed a long frostfree period and high accumulative temperature.The ecological conditions in Jilin could not satisfy the needs of flower bud differentiation for highbush blueberry,so the flower bud differentiation of highbush blueberry could not be completed in one year.Phenological period of lowbush blueberry Blomidon was the earliest,and growth period was much shorter.The phenomenon of two times′ blossoms appeared in Liaoning and Shandong because of high accumulative temperature and long frost-free period.